16th Century Ca. 1500: The Vicar of the St. Sebalds church, Georg Hartmann, invents the cali-ber system based on the relation of the diameter of the bore to the weight of the ball. Ca. 1500: Oldest still preserved hand cannon with spark producing ignition mechanism. It is known by the name of ‘Monks Gun’ and is displayed at the ‘Rüstkammer’ in Dresden. Ca. 1500: First appearance of rifled barrels. Ca. 1500: Introduction of the tube sight. Ca. 1515: First use of the wheel lock, presumably in Nürnberg. Ca. 1520: Introduction of the pin shaped trigger. Ca. 1520: Use of bandoliers by musketeers, with powder portions, ball bag and priming powder flask.